Governor for supplying gaseous fuel



- (MOdGlS) A. DARLING.

GOVERNOR FOR SUPPI'LYING GASBOUS FUEL.

No. 328,468. Patented. Oct. 20,1885.

HTVBNTOR 65W BY m ATTORNEYS.

WITNESSES W V Jawy UNITED STATES PATENT Fries.

ALPHEUS DARLING, OF PETROLIA, PENNSYLVANIA.

GOVERNOR FOR SUPPLYING GASEOUS FUEL.

SPECIFICATION forming part of Letters Patent No. 328,468, dated October20, 1885.

Application filed January 3, 1885. Serial No. 151,937.

To all whom it may concern:

Be it known that I, ALPHEUS DARLING, of Petrolia, in the county ofButler and State of Pennsylvania, have invented a new and ImprovedGovernor for Controlling the Supply of Gaseous Fuel, of which thefollowing is a full, clear, and exact description.

My invention relates to governors for automatically controlling thesupply of gaseous fuel to steam-boilers from the gas-tubes of oilwellsor other source, the object being to improve governors of this class, soas to make them more sensitive to variations of boilerpressure, to moreclosely govern the fuelsupply, and also to increase their generalefficiency and durability.

My invention consists in certain peculiarities of construction andcombinations of parts of the governor and its connections to the gaswell or source, and to the steam-boiler, all as hereinafter fullydescribed and claimed.

Reference is to be had to the accompanying drawings,forming part of thisspecification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 is a side elevation showing my improved governor connected witha steamboiler, to control its gaseous fuel supply, and with thegas-supply pipe. Fig. 2 is an enlarged longitudinal sectional elevationthrough the governor. Fig. 3 is an enlarged detail sectional view of ajoint between two of the expansion drums or chambers which move thevalve to cut off the fuel-supply, and Fig. 4 is a side face view of oneof the expansion-drums, drawn to the scale of Fig. 2.

The letter A indicates the governor, which I make with a body portion orcase, B, bored centrally to form the valve-chamber O, in which thedouble piston-valve D is fitted to slide.

I prefer to make the pistons 01 d of the valve separate from its stem (1and hold the pistons to the stem by set-screws, permitting their ad- 5justment on the stem with reference to the ports E F in case B, whichopen into the chamber (3, nipples e f being provided around the ports toreceive pipe or cap connections.

At G is shown a port in case B, which port opens into the chamber 0, ata point about midway between the valve-pistons d d and ports E F, andhas preferably a surrounding (ModeL) nipple, g, to which the gas-supplypipe H, leading from the gastube of the oilwell, is connected, to admitthe gas to the valvechamber.-

A pipe, I, connects the port E with the gasconsuming furnace of theboiler J, and the port F may either be left open at its outer end or acap may be screwed on its nipple f to close it, or a pipe may beconnected at f to lead escaping gas to any suitable reservoir.

Above or beyond the valve-chamber O a larger chamber, K, is formed, togive room for one or more expansible drums or chambers, L, held to thecap-plate M, which is fastened by screws m or otherwise to the body ofthe governor.

The drums L consist each of a couple of thin strong sheet-metal platesor diaphagms, 11, connected at a little distance apart by a rim, so asto form water and steam tight chambers.

When a single drum, L, is used, its outer plate will open into a fixedscrew neck or nipple, N, fitted to a tapped hole in the center of thecap M, and a lock-nut, n, screwed on the end of the neck N, holds thedrum to place, and the inner plate of the drum will be imperforate andwill bear at its center on the end of the valve-stem d but I prefer toemlarger degree of expansion or the same amount of expansion with lesstension of the diaphragm, and in this case the adjacent plates, Z Z, ofcontiguous drums will be provided with screw-nipples l, which may beturned into threaded opposite ends of a screw-collar, O, with suitablepackings, 0, interposed between the ends of the nipples and shoulders ofthe collar to prevent leakage from the drums, and the inner plate of theinner drum L, will be imperforate to bear on the valve-stem, as will beunderstood from Figs. 2 and 3.

I prefer to form crips, beads, or corrugations Z around or near theouter margins of the drum-plates Z, to give them easier and greaterexpansion.

To the projecting end of the nipple N is connected the pipe P, which isconnected with the steam-space of the boiler J ,to admit steam underboiler-pressure to the interior of the drums L.

To the lower end of the body B of the govalong the chamber toward thedrums L, and

a set-screw, U, threaded into the. end of the piece R,vmay befadjustedto force the plate S inward (more or less) for regulating thetension of the spring T.

At V is a vent, allowing escape of any gas 7 which may leak past thepistons d of the valve, and is is a vent for the escape of any gas whichmay leak past the piston d into the chamher K.

The operation is as follows; The tension of spring T will be regulatedby screw U, so as to hold the valve-stem d against the unexpanded drumor drums L when steam entering the drum or drums, from the boiler is atthe desired pressure, and the valve-piston d then will give the desiredopening. at theport E to pass the required amount of gas to theboiler-furnace, and the valve-piston d will close the port F. If, forany reason,the steampressure in the boiler J should suddenly increase, alike pressure will be exerted inthe drum or drums L, and will expandthem so as to force the valve D back and close the port E (moreor less)by piston d,to cut off the fuel-supply until the steam-pressure lowersto the prescribed or normal limit, and as the valve moves back thepiston d will uncover the port F (more or less) to allow any excess ofgas to escape to the open air or to a connected reservoir; or the port Fmay be closed by a-cap or plug, as above stated, so that the pressure ofthe gas will back up in the pipe H; hence it is obvious that the port Fis not essential to the working of the governor, but its use ispreferred.

It will be seen that the gas-supply enters the governor through port G,between the opposite valve-pistons, which have like area, hence thevalve will always be balanced, how

ever the pressure of the entering gas may vary, and the sensitiveness ofthe governor will be preserved,so it will closely control the supply ofgaseous fuel to the boiler.

An important advantage resulting from the use of the closed metaldrumdiaphragms L, over diaphragms consisting of a plate'of rub; ber, as inother gas-governors, is that the expanding drums L are not so liable tobe corroded by the steam or water admitted to them,

so as to pass the steam or water to the valve.

mechanism and gassupply pipes to injure and choke them, and thedrum-diaphragms more sensitively control the fuel-supply un-. derextreme variations in steam-pressure.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. A governor for controlling the supply of gaseous fuel, constructedwith a double piston valve working in a case which has an inlet-portopening between the valve-pistons and an outlet-port adapted to beclosed more or less by one of thepistons, an expansible diaphragm opento pressure and touching one end of the valve, and a spring pressing onthe other end of the valve, substantially as here-- in set forth. 4

2. A governor for controlling the supply of gaseous fuel, constructedwith a double piston-valve working in a case which has aninlet-port'opening between the valve-pistons,an outlet-port adapted tobe closed more or less by one of the pistons, and a waste-port adaptedto be opened by the other piston, an expansible diaphragm open topressure and touching one end of the valve, and a spring pressing'on theother end of the valve, substantially as herein set forth.

3. The governor A, comprising a case, B, chambered at O, a valve, D,having pistons d d, and working in chamber 0, an inlet-port, G, openinginto said chamber between the valve-pistons, an outlet-port, E, adaptedto be closed by one of the valve-pistons, an expansible diaphragmconsisting of one 01' more drums, L,havi'ng fiexible side walls andadapted to be connected with a pipe to receive an expanding fluid, andresting ,on one end of the valve, and a spring acting to force the valveagainst the expansible diaphragm, substantially as herein set forth.

4.. The'governorA, comprising a case, l3,v

chambered at O, and having ports G E F, a double pis ton-valve,D, one ormore close expandingdrum diaphragms, L, the spring T, andtension-regulating screw U, substantially as herein set forth. I

5. The combination, in an apparatus for regulating the supply of gaseousfuel to steamboi'lers, of the governor A, made with a case,

B, chambered at O, and having aport, G, the, pipeH, conductingthe gas tothe governor,

which has an outlet-port, E, connected by a pipe, I, to theboiler-furnace, an expansible diaphragm consisting of one or more drums,L, and connected by apipe, P, with the boiler,

and a spring forcing the valve D against the, drum-diaphragm,substantially as herein setv forth.

ALPHEUS DARLING.

Wlitnessesz' M. E, DARLING, I A. M. DARLING.

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